Index: /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/TSQLExpressionFormatter.cs
===================================================================
--- /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/TSQLExpressionFormatter.cs (revision 15902)
+++ /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/TSQLExpressionFormatter.cs (revision 15902)
@@ -0,0 +1,278 @@
+#region License Information
+/* HeuristicLab
+ * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ *
+ * This file is part of HeuristicLab.
+ *
+ * HeuristicLab is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * HeuristicLab is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HeuristicLab. If not, see .
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using HeuristicLab.Common;
+using HeuristicLab.Core;
+using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
+using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
+
+namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
+ internal static class StringBuilderExtensions {
+ internal static void AppendIndented(this StringBuilder strBuilder, int level, string text) {
+ strBuilder.Append(new string(' ', level * 2));
+ strBuilder.Append(text);
+ }
+ internal static void AppendLineIndented(this StringBuilder strBuilder, int level, string text) {
+ strBuilder.Append(new string(' ', level * 2));
+ strBuilder.AppendLine(text);
+ }
+ }
+
+ [Item("TSQL String Formatter", "String formatter for string representations of symbolic data analysis expressions in TSQL syntax.")]
+ [StorableClass]
+ public sealed class TSQLExpressionFormatter : NamedItem, ISymbolicExpressionTreeStringFormatter {
+ [StorableConstructor]
+ private TSQLExpressionFormatter(bool deserializing) : base(deserializing) { }
+ private TSQLExpressionFormatter(TSQLExpressionFormatter original, Cloner cloner) : base(original, cloner) { }
+ public TSQLExpressionFormatter()
+ : base() {
+ Name = ItemName;
+ Description = ItemDescription;
+ }
+ public override IDeepCloneable Clone(Cloner cloner) {
+ return new TSQLExpressionFormatter(this, cloner);
+ }
+
+ public string Format(ISymbolicExpressionTree symbolicExpressionTree) {
+ // skip root and start symbols
+ StringBuilder strBuilder = new StringBuilder();
+ GenerateHeader(strBuilder, symbolicExpressionTree);
+
+ //generate function body
+ FormatRecursively(1, symbolicExpressionTree.Root.GetSubtree(0).GetSubtree(0), strBuilder);
+
+ GenerateFooter(strBuilder);
+ return strBuilder.ToString();
+ }
+
+ private void GenerateHeader(StringBuilder strBuilder, ISymbolicExpressionTree symbolicExpressionTree) {
+ HashSet floatVarNames = new HashSet();
+ foreach (var node in symbolicExpressionTree.IterateNodesPostfix().Where(x => x is VariableTreeNode || x is VariableConditionTreeNode)) {
+ floatVarNames.Add(((IVariableTreeNode)node).VariableName);
+ }
+ var sortedFloatIdentifiers = floatVarNames.OrderBy(n => n, new NaturalStringComparer()).Select(n => VariableName2Identifier(n)).ToList();
+
+ HashSet varcharVarNames = new HashSet();
+ foreach (var node in symbolicExpressionTree.IterateNodesPostfix().Where(x => x is BinaryFactorVariableTreeNode || x is FactorVariableTreeNode)) {
+ varcharVarNames.Add(((IVariableTreeNode)node).VariableName);
+ }
+ var sortedVarcharIdentifiers = varcharVarNames.OrderBy(n => n, new NaturalStringComparer()).Select(n => VariableName2Identifier(n)).ToList();
+
+ //Generate comment and instructions
+ strBuilder.Append("-- generated. created function can be used like 'SELECT dbo.REGRESSIONMODEL(");
+ strBuilder.Append(string.Join(", ", sortedVarcharIdentifiers));
+ if (varcharVarNames.Any() && floatVarNames.Any())
+ strBuilder.Append(",");
+ strBuilder.Append(string.Join(", ", sortedFloatIdentifiers));
+ strBuilder.AppendLine(")'");
+ strBuilder.AppendLine("-- use the expression after the RETURN statement if you want to incorporate the model in a query without creating a function.");
+
+ //Generate function header
+ strBuilder.Append("CREATE FUNCTION dbo.REGRESSIONMODEL(");
+ strBuilder.Append(string.Join(", ", sortedVarcharIdentifiers.Select(n => string.Format("{0} NVARCHAR(max)",n))));
+ if (varcharVarNames.Any() && floatVarNames.Any())
+ strBuilder.Append(",");
+ strBuilder.Append(string.Join(", ", sortedFloatIdentifiers.Select(n => string.Format("{0} FLOAT",n))));
+ strBuilder.AppendLine(")");
+
+ //start function body
+ strBuilder.AppendLine("RETURNS FLOAT");
+ strBuilder.AppendLine("BEGIN");
+
+ //add variable declaration for convenience
+ strBuilder.AppendLineIndented(1, "-- added variable declaration for convenience");
+ foreach (var name in sortedVarcharIdentifiers)
+ strBuilder.AppendLineIndented(1, string.Format("-- DECLARE {0} NVARCHAR(max) = ''", name));
+ foreach (var name in sortedFloatIdentifiers)
+ strBuilder.AppendLineIndented(1, string.Format("-- DECLARE {0} FLOAT = 0.0", name));
+ strBuilder.AppendLineIndented(1, "-- SELECT");
+ strBuilder.AppendLine("RETURN ");
+ }
+
+ private void FormatRecursively(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ if (node.Subtrees.Any()) {
+ if (node.Symbol is Addition) {
+ FormatOperator(level, node, "+", strBuilder);
+ } else if (node.Symbol is And) {
+ FormatOperator(level, node, "AND", strBuilder);
+ } else if (node.Symbol is Average) {
+ FormatAverage(level, node, strBuilder);
+ } else if (node.Symbol is Cosine) {
+ FormatFunction(level, node, "COS", strBuilder);
+ } else if (node.Symbol is Division) {
+ FormatDivision(level, node, strBuilder);
+ } else if (node.Symbol is Exponential) {
+ FormatFunction(level, node, "EXP", strBuilder);
+ } else if (node.Symbol is GreaterThan) {
+ FormatOperator(level, node, ">", strBuilder);
+ } else if (node.Symbol is IfThenElse) {
+ FormatIfThenElse(level, node, strBuilder);
+ } else if (node.Symbol is LessThan) {
+ FormatOperator(level, node, "<", strBuilder);
+ } else if (node.Symbol is Logarithm) {
+ FormatFunction(level, node, "LOG", strBuilder);
+ } else if (node.Symbol is Multiplication) {
+ FormatOperator(level, node, "*", strBuilder);
+ } else if (node.Symbol is Not) {
+ FormatOperator(level, node, "NOT LIKE", strBuilder);
+ } else if (node.Symbol is Or) {
+ FormatOperator(level, node, "OR", strBuilder);
+ } else if (node.Symbol is Xor) {
+ throw new NotSupportedException(string.Format("Symbol {0} not yet supported.", node.Symbol.GetType().Name));
+ } else if (node.Symbol is Sine) {
+ FormatFunction(level, node, "SIN", strBuilder);
+ } else if (node.Symbol is Subtraction) {
+ FormatSubtraction(level, node, strBuilder);
+ } else if (node.Symbol is Tangent) {
+ FormatFunction(level, node, "TAN", strBuilder);
+ } else if (node.Symbol is Square) {
+ FormatFunction(level, node, "SQUARE", strBuilder);
+ } else if (node.Symbol is SquareRoot) {
+ FormatFunction(level, node, "SQRT", strBuilder);
+ } else if (node.Symbol is Power) {
+ FormatFunction(level, node, "POWER", strBuilder);
+ } else if (node.Symbol is Root) {
+ FormatRoot(level, node, strBuilder);
+ } else {
+ throw new NotSupportedException("Formatting of symbol: " + node.Symbol + " not supported for TSQL symbolic expression tree formatter.");
+ }
+ } else {
+ if (node is VariableTreeNode) {
+ var varNode = node as VariableTreeNode;
+ strBuilder.AppendFormat("{0} * {1}", VariableName2Identifier(varNode.VariableName), varNode.Weight.ToString("g17", CultureInfo.InvariantCulture));
+ } else if (node is ConstantTreeNode) {
+ var constNode = node as ConstantTreeNode;
+ strBuilder.Append(constNode.Value.ToString("g17", CultureInfo.InvariantCulture));
+ } else if (node.Symbol is FactorVariable) {
+ var factorNode = node as FactorVariableTreeNode;
+ FormatFactor(level, factorNode, strBuilder);
+ } else if (node.Symbol is BinaryFactorVariable) {
+ var binFactorNode = node as BinaryFactorVariableTreeNode;
+ throw new NotSupportedException(string.Format("Symbol {0} not yet supported.", node.Symbol.GetType().Name));
+ } else {
+ throw new NotSupportedException("Formatting of symbol: " + node.Symbol + " not supported for TSQL symbolic expression tree formatter.");
+ }
+ }
+ }
+
+ private void FormatIfThenElse(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ strBuilder.Append("CASE ISNULL((SELECT 1 WHERE");
+ FormatRecursively(level,node.GetSubtree(0), strBuilder);
+ strBuilder.AppendLine("),0)");
+ strBuilder.AppendIndented(level,"WHEN 1 THEN ");
+ FormatRecursively(level, node.GetSubtree(1), strBuilder);
+ strBuilder.AppendLine();
+ strBuilder.AppendIndented(level, "WHEN 0 THEN ");
+ FormatRecursively(level, node.GetSubtree(2), strBuilder);
+ strBuilder.AppendLine();
+ strBuilder.AppendIndented(level, "END");
+ }
+
+ private void FormatAverage(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ strBuilder.Append("(");
+ foreach (var child in node.Subtrees) {
+ FormatRecursively(level, child, strBuilder);
+ if (child != node.Subtrees.Last())
+ strBuilder.Append(" + ");
+ }
+ strBuilder.AppendFormat(") / {0}", node.Subtrees.Count());
+ }
+
+ private string VariableName2Identifier(string variableName) {
+ return "@"+variableName.Replace(' ', '_');
+ }
+
+ private void GenerateFooter(StringBuilder strBuilder) {
+ strBuilder.Append(Environment.NewLine);
+ strBuilder.AppendLine("END");
+ }
+
+
+ private void FormatOperator(int level, ISymbolicExpressionTreeNode node, string symbol, StringBuilder strBuilder) {
+ strBuilder.Append("(");
+ foreach (var child in node.Subtrees) {
+ FormatRecursively(level, child, strBuilder);
+ if (child != node.Subtrees.Last())
+ strBuilder.Append(" " + symbol + " ");
+ }
+ strBuilder.Append(")");
+ }
+
+ private void FormatFunction(int level, ISymbolicExpressionTreeNode node, string function, StringBuilder strBuilder) {
+ strBuilder.Append(function + "(");
+ foreach (var child in node.Subtrees) {
+ FormatRecursively(level++, child, strBuilder);
+ if (child != node.Subtrees.Last())
+ strBuilder.Append(", ");
+ }
+ strBuilder.Append(")");
+ }
+
+ private void FormatDivision(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ if (node.SubtreeCount == 1) {
+ strBuilder.Append("1.0 / ");
+ FormatRecursively(level, node.GetSubtree(0), strBuilder);
+ } else {
+ FormatRecursively(level, node.GetSubtree(0), strBuilder);
+ strBuilder.Append("/ (");
+ for (int i = 1; i < node.SubtreeCount; i++) {
+ if (i > 1) strBuilder.Append(" * ");
+ FormatRecursively(level, node.GetSubtree(i), strBuilder);
+ }
+ strBuilder.Append(")");
+ }
+ }
+
+ private void FormatSubtraction(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ if (node.SubtreeCount == 1) {
+ strBuilder.Append("-");
+ FormatRecursively(level, node.GetSubtree(0), strBuilder);
+ return;
+ }
+ //Default case: more than 1 child
+ FormatOperator(level, node, "-", strBuilder);
+ }
+
+ private void FormatRoot(int level, ISymbolicExpressionTreeNode node, StringBuilder strBuilder) {
+ strBuilder.AppendLine("POWER(");
+ FormatRecursively(level, node.GetSubtree(0), strBuilder);
+ strBuilder.AppendLineIndented(level, " , 1.0 / (");
+ FormatRecursively(level, node.GetSubtree(1), strBuilder);
+ strBuilder.AppendLineIndented(level, "))");
+ }
+
+ private void FormatFactor(int level, FactorVariableTreeNode node, StringBuilder strBuilder) {
+ strBuilder.AppendLine("( ");
+ strBuilder.AppendLineIndented(level + 1, string.Format("CASE {0}", VariableName2Identifier(node.VariableName)));
+ foreach (var name in node.Symbol.GetVariableValues(node.VariableName)) {
+ strBuilder.AppendLineIndented(level + 2, string.Format("WHEN '{0}' THEN {1}", name, node.GetValue(name).ToString(CultureInfo.InvariantCulture)));
+ }
+ strBuilder.AppendLineIndented(level + 1, "ELSE NULL END");
+ strBuilder.AppendIndented(level, ")");
+ }
+
+ }
+}
Index: /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4.csproj
===================================================================
--- /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4.csproj (revision 15901)
+++ /trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4.csproj (revision 15902)
@@ -141,4 +141,5 @@
+